Ion

neurons are surrounded by a myelin sheath that is made of Schwann cells. The function of myelin sheath are its speeds up the transmission of nerve impulses along the axon and acts as an electrical insulator and prevent movement of ions such as sodium ion and pottasium ion through it. When the myelin sheath were to be broken or damaged in any way, the signals trying to make their way through that neuron would become weakened or even cut off altogether. (Tengku Norbaya, Lecture Notes Biology…

My topic of interest is the science behind slime. I have researched and found ideas that relate to topics we have learned so far in the first marking period in science. Slime is made up of elements that are mixed together. The "slime" formula is sodium tetraborate decahydrate (Na2B4O7•10H2O), commonly known as borax, to a solution of white glue and water. White glue is an example of a polymer--it is made of long chains of polyvinyl clear plastic film molecules. These chains slide past one…

degrading the newly formed ECM. It is observed that the MMPs are highly over expressed in case of diabetic wounds. Alendronate is a bisphosphonate molecule that is capable of binding to divalent ions like Zn2+, Ca2+. These divalent ions are the major cofactors for MMP activity. Thereby the binding of these divalent ions by alendronate will inhibit the activity of the over expressed MMPs and thereby enable in the faster healing of chronic diabetic wounds. 2. How can the alendronate and…

The Great Barrier Reef (GBR) is home to hundreds of species of coral, fish, and other animals. Its total area is roughly the same as that of Italy or Germany. As the world’s largest coral reef ecosystem, the GBR supports more species per unit area than any other marine ecosystem. The reef also contributes around 6 billion dollars annually to Australia’s economy. However, the reef is under considerable stress due to a recently increasing trend in sea temperature, ocean acidification, sea level,…

Chemistry is the study of atoms. Chemical scientists study what atoms are made of and how they connect. Atoms are the building blocks of matter. Atoms are made up of protons, neutrons and electrons. It was John Dalton who put forward his ideas and theories about atoms at the beginning of the 19th century: Dalton proposed that atoms were like tiny, hard balls (Absorb Learning, 2008). Then at the end of the 19th century JJ Thompson discovered the electron through an experiment. When JJ Thompson…

molecules based on a variety of things. In labs 3 and 4 we looked at two of the characteristics that molecules carry that can help separate them. Lab 3 used spectrophotometry once again, but the concept that garnered the most interest was ion exchange chromatography. Ion exchange chromatography works by separating molecules based on the individual charges they carry. In our case we used anion exchange chromatography, which means that our resin was positively charged so the negative molecules…

Tarpenning; Eberhard as an engineer and Tarpenning as an entrepreneur. In 1996 they founded NuvoMedia a lithium ion battery company which inspired the idea of a lithium ion battery powered car; by 2000 they sold the company for $187,000 and they used this money to buy AC propulsion a company that built electric sports cars called tzero. Together Eberhard and AC propulsion made a lithium-ion version of the tzero. Though Eberhard and Tarpenning came up with the idea a few years before Tesla Motors…

B. Buffers. 1. Two solutions, A. being 1.0 x HCl, and B. being 0.10 M will be given, as well as buffer solution 1 M NaOH. 2. Have 25 mL of solution A. and B. in two separate beakers. 3. Check the pH of both solutions without any NaOH first. Then begin checking pH after 1 drop, then after 10 drops, and lastly 25 drops. After each set of drops be sure to mix solutions. 4. Compare both sets of pH to determine which had an easier time resisting change. C. Titration curves. 1. Insert NaOH into…

Pure Copper Iodide were synthesised and the mass percentage of Copper in purified Copper (I) Iodide sample were determined by applying Beer’s Law in UV-Vis spectroscopy. Absorbance value of Cu-cuprizone solution was measured. Using the absorbance value of 0.3576 , the concentration of the Cu-cuprizone solution were obtained at 0.001389g/L with reference to the graph of the standard solution A to D. The graph of absorbance against concentration of the standard solution A to D shows a linear…

The Carbon Cycle Addition of carbon to the atmosphere Respiration: Through respiration, carbon dioxide can be added to the atmosphere. Living organisms use respiration to turn food into usable energy. Aerobic respiration requires oxygen to take place, and produces carbon dioxide, releasing it into the air and atmosphere. The energy taken from the food molecules following digestion is used to fuel the organism, additionally when mixed with oxygen, releases carbon dioxide when exhaling.…